Star flare in Eevee?
AFAIK, values rendered fromm Eevee don't seem to be taken into acount when compositing. I don't know if it's a bug. But here's a work around :


Set a color for the objects you want to add streaks on. Make sure you don't use that color anywhere else in your scene. I used a full red (rgb 1:0:0)
In the compositor, we will use a Chroma Key node do create a mask out of that color. Play with the cutoff &amp; acceptance to really isolate your lights
With Alpha Over node, we will take the original render and use the new mask as factor to put our lights on black background
Let's add a glare node. The mix value must be set to 0
Mix the glare result to the original render with 0.5 factor




It's really not the best solution but hopefully, all the render passes will be back at some point.